CN110455178A - A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer - Google Patents
A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer Download PDFInfo
- Publication number
- CN110455178A CN110455178A CN201910844599.XA CN201910844599A CN110455178A CN 110455178 A CN110455178 A CN 110455178A CN 201910844599 A CN201910844599 A CN 201910844599A CN 110455178 A CN110455178 A CN 110455178A
- Authority
- CN
- China
- Prior art keywords
- rotation
- slot
- axle magnetometer
- housing
- control board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention discloses a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer, the housing is fixed on above the boss by passing through the fixing bolt of the boss, the sensor main control board is mounted on the housing inner top, the three axle magnetometer module is mounted on the sensor main control board, the sensor main control board is equipped with processor unit, power module and data communication unit, the data communication unit uses RS485 interface and communications protocol, the three axle magnetometer module carries out detection to the magnetic field that magnetic part generates and sends the magnetic field intensity signal measured to the processor unit, the processor unit carries out processing to magnetic field intensity signal and is converted into after the rotation radian information of rotary part to be sent out through data communication unit.The present invention has detection accurate, and tolerance is moist and more dust environment, the advantages of without being directly connected to rotary part.
Description
Technical field
The invention belongs to inductor fields, and in particular to a kind of rotation state of rotation part parameter based on three axle magnetometer
Detection sensor.
Background technique
When detecting the rotation status of rotary part the prior art mainly adopts angular transducer, angular transducer is answered extensively
Used in fields such as industrial and agricultural production, meteorology, environmental protection, national defence, scientific research, space flight, the main angle rotated to part that rises is detected
And control system is transferred to have the function that realize functional mapping.But angular transducer needs at the axle center with rotatable parts
It is mutually connected in many scenes and is not available.For example the shaft end of rotary part cannot be directly connected to sensor equipped with other component, or
Person's dust clast is more, is easy to cause to wear to the spindle portion on angular transducer, influences detection accuracy.Therefore it needs now
It is a kind of without directly connecting the sensor that can accurately detect rotary part rotary state with rotary part.
Summary of the invention
The rotation state of rotation part parameter detecting sensing based on three axle magnetometer that the purpose of the present invention is to provide a kind of
Device, to solve turn of the rotary state for being difficult to detect the rotary part for being not easy to be directly connected in the prior art and inductor
Axis is easy the problem of by dust chipping wear.
The rotation state of rotation part parameter detecting sensor based on three axle magnetometer, including three axle magnetometer mould
Block, sensor main control board, cast aluminium main casing, water proof and dust proof connector and the magnetic portion being independently arranged on rotary part
Part, the cast aluminium main casing include pedestal and housing, and the pedestal is equipped with to be led to the matched boss in housing lower end, the housing
It crosses and is fixed on above the boss across the fixing bolt of the boss, the sensor main control board is mounted on the housing
Inner top, the three axle magnetometer module are mounted on the sensor main control board, on the sensor main control board
Equipped with processor unit, power module and data communication unit, the data communication unit is using RS485 interface and communication association
View, the three axle magnetometer module carry out detection to magnetic field that magnetic part generates and measure to processor unit transmission
Magnetic field intensity signal, the processor unit carry out the rotation radian information that processing is converted into rotary part to magnetic field intensity signal
It is sent out by data communication unit.
Preferably, the housing side is equipped with and patches through slot, and described patch is equipped with the RS485 interface in through slot,
RS485 interface is connected to the data communication units, the water proof and dust proof connector be fixedly mounted on it is described patch on the outside of through slot,
Including jacket layer, inner sleeve bottom and interior jacket layer, the interior jacket layer is located in the jacket layer to be linked as by inner sleeve bottom and the outer layer
One forms slot between the interior jacket layer and the jacket layer at grafting set socket, described to patch through slot and the RS485
It is fixed between interface by installation set, elastic seal ring is equipped between the installation set and the inner sleeve bottom.
Preferably, the housing lower end surface is equipped with the sealed convex edge around housing opening, is equipped with above the boss
Seal groove corresponding with the sealed convex edge, the seal groove include being inserted into the chimb slot of the sealed convex edge and being located at described convex
The closure gasket groove of side slot bottom sides, sealing ring is equipped in the closure gasket groove, and the sealed convex edge is inserted into the sealing
Slot is pressed on the sealing ring.
Preferably, described patch is equipped with concave mouth on the inside of through slot, and the elastic seal ring is bonded in the installation set side,
The installation set other side is pressed in the concave mouth.
Preferably, the magnetic part includes magnet installation part and permanent magnet, and magnet installation part top is packet in institute
State the groove structure outside permanent magnet and lower part is the connection structure being connected on rotary part.
Preferably, the permanent magnet is cylindrical body, and the inner cavity of the groove structure and the permanent magnet are interference fitted, described
Connection structure is to be fixed on the threaded post of the groove structure bottom.
The present invention is using three axle magnetometer module as the means of detection magnetic field strength, by the way that magnetic is arranged on rotary part
Property component, generate with rotary part rotate and generate changing magnetic field.The detection part of sensor need not be with rotary part in this way
It is directly connected to, but the position by being fixed on face magnetic part, by detecting the fixation position in rotary part with respect to it
Magnetic part generates change of magnetic field strength when rotation, meets sine curve according to this magnetic field cyclically-varying and the relationship of time
The principle of function, parses this rotation status that rotary part is inscribed when each in the process, that is, the radian rotated solves in this way
Before the sensor that proposes be difficult to the problem of detecting the rotary state for the rotary part for being not easy to be directly connected to.Moreover, passing through
The threshold value of setting detection magnetic field strength, periodic samples and the modes such as is filtered to testing result and can effectively exclude external magnetic field
The interference of generation, therefore can guarantee higher accuracy, movable part on inductor will not be generated because of detection bad environments
The defect that part is prone to wear.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the main view of structure shown in Fig. 1；
Fig. 3 is explosive view of the invention；
Fig. 4 is the partial enlarged view of water proof and dust proof connector in structure shown in Fig. 1；
Fig. 5 is the structural schematic diagram of magnetic part in the present invention；
Fig. 6 is the connection structure diagram of each circuit module in the present invention.
Appended drawing reference in above-mentioned attached drawing are as follows:
1, housing, 11, sealed convex edge, 2, pedestal, 21, boss, 3, water proof and dust proof connector, 31, jacket layer, 32, inner sleeve
Bottom, 33, interior jacket layer, 34, annular clamping groove, 35, elastic seal ring, 36, patch through slot, 4, sensor main control board, 5, three
Axis magnetometer module, 6, sealing ring, 7, RS485 interface, 8, permanent magnet, 9, magnet installation part.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making further details of theory to the specific embodiment of the invention
It is bright, to help those skilled in the art to have more complete, accurate and deep reason to inventive concept of the invention, technical solution
Solution.
Embodiment 1:
As shown in figures 1 to 6, the present invention provides a kind of rotary part based on three axle magnetometer is contorted in the present embodiment
State parameter detecting sensor, including three axle magnetometer module 5, sensor main control board 4, cast aluminium main casing, water proof and dust proof connect
Plug-in unit 3 and the magnetic part being independently arranged on rotary part, the cast aluminium main casing includes pedestal 2 and housing 1, the pedestal
2 be equipped with the matched boss 21 in 1 lower end of housing, the housing 1 by pass through the boss 21 fixing bolt be fixed on institute
It states above boss 21.
The sensor main control board 4 is mounted on 1 inner top of housing, and the three axle magnetometer module 5 is mounted on
On the sensor main control board 4, the sensor main control board 4 is equipped with processor unit, power module and data
Communication unit.The data communication unit uses RS485 interface 7 and communications protocol, and the three axle magnetometer module 5 is to magnetic portion
The magnetic field that part generates carries out detection and sends the magnetic field intensity signal measured, the processor unit pair to the processor unit
Magnetic field intensity signal be sent out after handling the rotation radian information for being converted into rotary part through data communication unit.Power supply
Module is respectively powered three axle magnetometer module 5, processor unit and data communication unit according to respective requirement.
The magnetic part includes magnet installation part 9 and permanent magnet 8,9 top of magnet installation part be packet it is described forever
Groove structure outside magnet 8 and lower part is the connection structure being connected on rotary part.The permanent magnet 8 is cylindrical body, described
The inner cavity of groove structure and the permanent magnet 8 are interference fitted, and the connection structure is the spiral shell for being fixed on the groove structure bottom
Line column.As long as consolidating for realization magnetic part can be connect by nut with threaded post by carrying out punching in the installation site of rotary part
It is fixed.This outer magnet installation part 9 can also be mounted on rotary part using welding or snap fit.
Rotatable parts are easy to happen in the environment of clast is more or has water to get rusty, corrode and wears, and is in this programme
The service life of this sensor is improved, will guarantee to seal at the interface of sensor and the connection structure of cast aluminium main casing.Institute
1 side of housing is stated equipped with through slot 36 is patched, described patch is equipped with the RS485 interface 7 in through slot 36, RS485 interface 7 connects
Be connected to the data communication units, the water proof and dust proof connector 3 be fixedly mounted on it is described patch 36 outside of through slot, including it is outer
Jacket layer 311, inner sleeve bottom 312 and interior jacket layer 313, the interior jacket layer 313 be located in the jacket layer 311 by inner sleeve bottom 312 with
The outer layer is linked together, and forms slot between the interior jacket layer 313 and the jacket layer 311 at grafting set socket, described
Patch fixed by installation set 37 between through slot 36 and the RS485 interface 7, the installation set 37 and the inner sleeve bottom 312
Between be equipped with elastic seal ring 32.
Described patch is equipped with concave mouth 14 on the inside of through slot 37, the elastic seal ring 32 is bonded in the installation set 37 1
Side, 37 other side of installation set are pressed in the concave mouth 14.Installation set 37 be fastened and inserted on RS485 interface 7 realize it is close
Envelope, inner sleeve base pressure live elastic seal ring 32 and improve installation set 37 and patch the leakproofness between through slot 36, prevent clast and water
Detection part is penetrated into, in case internal circuit is damaged.
1 lower end surface of housing is equipped with the sealed convex edge 11 around the housing 1 opening, and the boss 21 is equipped with above
Seal groove corresponding with the sealed convex edge 11, the seal groove include being inserted into the chimb slot of the sealed convex edge 11 and being located at
6 slot of sealing ring of the chimb slot bottom sides, sealing ring 6 is equipped in 6 slot of sealing ring, and the sealed convex edge 11 is inserted into
It is pressed on the sealing ring 6 to the seal groove.Above structure realizes the sealing of housing 1 Yu 2 junction of pedestal, improves and uses
Service life.
It is of the invention that install and use process as follows:
This detection sensor mounting rotating unit is fixed on corresponding support by the bolt being connected on pedestal first
On object, magnetic part is fixed on rotary part, enables permanent magnet direction described in detection sensor face.When rotary part rotates
Permanent magnet 8 moves together, the detection part of periodical proximity sensor.When rotary part rotation, 5 energy of three axle magnetometer module
Cyclically-varying is done in the magnetic field for detecting that permanent magnet 8 generates, and three axle magnetometer module 5 will be with the magnetic field in magnetic field one-component direction
The information of intensity is sent as testing result to the processor unit, and the processor unit is with given threshold, sampling processing
The magnetic field strength information of acquisition is handled with modes such as filtering processings, reduces and is interfered caused by external magnetic field, improves detection
Accuracy.Sinusoidal function is being met according to the relationship between magnetic field strength and time later, is thus calculating arc of rotation
Degree, to convert information obtained to the rotation radian information of rotary part, then is sent out through data communication unit.This
Sample not only reduces external interference, improves the accuracy of detection, and common angle inductor can be prevented because of shaft mill in inductor
Service life caused by damage is reduced, and has detection accurate, is resistant to moist and more dust environment, excellent without being directly connected to rotary part
Point.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as using the improvement for the various unsubstantialities that inventive concept of the invention and technical solution carry out, or without changing
Other occasions are directly applied to by present inventive concept and technical solution, within that scope of the present invention.
Claims (6)
1. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer, it is characterised in that: including three axis
Magnetometer module (5), sensor main control board (4), cast aluminium main casing, water proof and dust proof connector (3) and it is independently arranged at rotation
Magnetic part on rotation member, the cast aluminium main casing include pedestal (2) and housing (1), and the pedestal (2) is equipped with and housing
(1) the matched boss in lower end (21), the housing (1) are fixed on the boss by passing through the fixing bolt of the boss (21)
(21) above, the sensor main control board (4) is mounted on the housing (1) inner top, the three axle magnetometer module (5)
It is mounted on the sensor main control board (4), the sensor main control board (4) is equipped with processor unit, power supply
Module and data communication unit, the data communication unit use RS485 interface (7) and communications protocol, the three axle magnetometer
The magnetic field that module (5) generates magnetic part carries out detection and sends the magnetic field intensity signal measured to the processor unit,
The processor unit carries out processing to magnetic field intensity signal and is converted into after the rotation radian information of rotary part through data communication
Unit is sent out.
2. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer according to claim 1,
It is patched through slot (36) it is characterized by: housing (1) side is equipped with, described patch in through slot (36) is equipped with the RS485
Interface (7), RS485 interface (7) are connected to the data communication units, and the water proof and dust proof connector (3) is fixedly mounted on institute
It states and patches on the outside of through slot (36), including jacket layer (311), inner sleeve bottom (312) and interior jacket layer (313), interior jacket layer (313) position
In being linked together by inner sleeve bottom (312) with the outer layer in the jacket layer (311), the interior jacket layer at socket is covered in grafting
(313) slot is formed between the jacket layer (311), described patch passes through between through slot (36) and the RS485 interface (7)
Installation set (37) is fixed, is equipped with elastic seal ring (32) between the installation set (37) and the inner sleeve bottom (312).
3. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer according to claim 2,
It is characterized by: housing (1) lower end surface is equipped with the sealed convex edge (11) around the housing (1) opening, the boss
(21) it is equipped with seal groove corresponding with the sealed convex edge (11) above, the seal groove includes being inserted into the sealed convex edge (11)
Chimb slot and sealing ring (6) slot positioned at the chimb slot bottom sides are equipped with sealing ring in sealing ring (6) slot
(6), the sealed convex edge (11) is inserted into the seal groove and is pressed on the sealing ring (6).
4. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer according to claim 4,
It is characterized by: described patch is equipped with concave mouth (14) on the inside of through slot (37), the elastic seal ring (32) is bonded in the peace
Encapsulation (37) side, installation set (37) other side are pressed on the concave mouth (14).
5. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer according to claim 4,
It is characterized by: the magnetic part includes magnet installation part (9) and permanent magnet (8), magnet installation part (9) top is packet
In the outer groove structure of the permanent magnet (8) and lower part is the connection structure being connected on rotary part.
6. a kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer according to claim 5,
It is characterized by: the permanent magnet (8) is cylindrical body, the inner cavity of the groove structure and the permanent magnet (8) are interference fitted, institute
Stating connection structure is to be fixed on the threaded post of the groove structure bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844599.XA CN110455178A (en) | 2019-09-06 | 2019-09-06 | A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844599.XA CN110455178A (en) | 2019-09-06 | 2019-09-06 | A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110455178A true CN110455178A (en) | 2019-11-15 |
Family
ID=68491132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910844599.XA Pending CN110455178A (en) | 2019-09-06 | 2019-09-06 | A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110455178A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238338A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection system for bundling quantity and bundling length of square straw bundle bundling machine |
| CN111226615A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection method for bundling length of square straw bundle bundling machine based on magnetic sensor |
| CN111226617A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection method for bundling average bundling length of bundling machine based on magnetic sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201555598U (en) * | 2009-04-22 | 2010-08-18 | 南京奥联汽车电子电器有限公司 | Non-contact magnetic inductive type clutch turn angle sensor |
| CN103299247A (en) * | 2010-11-17 | 2013-09-11 | 希尔克瑞斯特实验室公司 | Apparatuses and methods for dynamic tracking and compensation of magnetic near field |
| CN204064236U (en) * | 2014-09-25 | 2014-12-31 | 大陆汽车电子(芜湖)有限公司 | For the non-contact angle sensor of efp |
| CN207717028U (en) * | 2018-01-15 | 2018-08-10 | 东莞市赛哲机电科技有限公司 | A kind of angular transducer |
| CN109716168A (en) * | 2016-07-13 | 2019-05-03 | Iskn公司 | Method for estimating the angular deviation between the reference axis of magnetic bodies and magnetic axis |
-
2019
- 2019-09-06 CN CN201910844599.XA patent/CN110455178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201555598U (en) * | 2009-04-22 | 2010-08-18 | 南京奥联汽车电子电器有限公司 | Non-contact magnetic inductive type clutch turn angle sensor |
| CN103299247A (en) * | 2010-11-17 | 2013-09-11 | 希尔克瑞斯特实验室公司 | Apparatuses and methods for dynamic tracking and compensation of magnetic near field |
| CN204064236U (en) * | 2014-09-25 | 2014-12-31 | 大陆汽车电子(芜湖)有限公司 | For the non-contact angle sensor of efp |
| CN109716168A (en) * | 2016-07-13 | 2019-05-03 | Iskn公司 | Method for estimating the angular deviation between the reference axis of magnetic bodies and magnetic axis |
| CN207717028U (en) * | 2018-01-15 | 2018-08-10 | 东莞市赛哲机电科技有限公司 | A kind of angular transducer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238338A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection system for bundling quantity and bundling length of square straw bundle bundling machine |
| CN111226615A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection method for bundling length of square straw bundle bundling machine based on magnetic sensor |
| CN111226617A (en) * | 2020-03-02 | 2020-06-05 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection method for bundling average bundling length of bundling machine based on magnetic sensor |
| CN111238338B (en) * | 2020-03-02 | 2021-04-13 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection system for bundling quantity and bundling length of square straw bundle bundling machine |
| CN111226615B (en) * | 2020-03-02 | 2022-04-22 | 安徽中科智能感知产业技术研究院有限责任公司 | Real-time online detection method for bundling length of square straw bundle bundling machine based on magnetic sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110455178A (en) | A kind of rotation state of rotation part parameter detecting sensor based on three axle magnetometer | |
| CN101846531B (en) | Multipole combined-type magnetic encoder | |
| CN103528605B (en) | A kind of capacitive absolute rotary encoder | |
| US7305864B2 (en) | Ball and socket joint for a motor vehicle | |
| CN203443595U (en) | Contactless potentiometer | |
| WO2023221953A1 (en) | High-precision multi-antipode magnetoelectric encoder | |
| CA2746071A1 (en) | Systems and methods for measuring angular motion | |
| CN100487367C (en) | Angle-measuring arrangement | |
| US20200008034A1 (en) | Using wireless data transmission to maintain intrinsic saftey of a gas meter | |
| CN101504286A (en) | Angle measuring device | |
| CN210089719U (en) | Rotary coding counting sensor and Internet of things water meter | |
| CN210154692U (en) | Positioning structure for detecting temperature of inner ring and outer ring of main shaft bearing | |
| CN103575448A (en) | Pressure transmitter for locomotive brake system | |
| CN215064312U (en) | Angle detection assembly and agricultural machine steering angle measuring device thereof | |
| CN208171855U (en) | A kind of underwater spectral class sensor original position caliberating device | |
| CN207163475U (en) | A kind of magnetic absolute angle sensor | |
| CN213904074U (en) | Rotary watch crown and wrist wearing equipment | |
| RU189082U1 (en) | ANGULAR POSITION SENSOR | |
| CN213932565U (en) | Structure of sensor | |
| CN212228069U (en) | Container door opening monitoring equipment based on acceleration sensor | |
| CN209459771U (en) | A kind of wireless temperature transmitter convenient for safeguarding, installation, debugging | |
| CN203249954U (en) | Electric energy meter with function of detecting alternating magnetic fields and constant magnetic fields | |
| CN203433189U (en) | Enclosed multifunctional industrial endoscope | |
| CN102620647B (en) | Waterproof type cable lifting device | |
| CN219496592U (en) | Magnetic induction sensor and magnetic induction sensing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191115 |
|
| RJ01 | Rejection of invention patent application after publication |